chore: reword .server-changes entry as a user-facing release note

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: Leafgard

.server-changes/hosting-clickhouse-system-logs.md

@@ -3,4 +3,4 @@ area: hosting
 type: fix
 ---
 
-Self-hosted ClickHouse no longer accumulates unbounded system-log telemetry (metric_log, text_log, asynchronous_metric_log, ...) that eventually pins the CPU in a background merge-retry loop on the recommended machine size; query_log and error_log are kept with a TTL, and the low-memory profile settings now actually apply (moved from config.d to users.d).
+Self-hosted ClickHouse now disables its unbounded internal telemetry tables and keeps query/error logs on a bounded retention, fixing runaway CPU and memory usage on the recommended machine size. Existing self-hosted deployments must drop the previously written disabled log tables separately to reclaim disk.